AIR CURTAIN CAP FOR PREVENTING INFLOW PULVERIZED COAL

摘要

An air curtain cap for preventing the inflow of pulverized coal is provided to form a main air jetting passage easily by combining outer and inner rings and to facilitate maintenance and repair works by exchanging only the inner ring if the inner bore is worn out. An air curtain cap(10) for preventing the inflow of pulverized coal restrains the pulverized coal from flowing into a gland of a hydraulic cylinder by making the air flowing into a channel(28) through an air hole(214) formed at a housing(212) of the hydraulic cylinder, flow toward the end of a rod end(320) through a main air jetting passage(30) in a gap spacer of a pulverizer. The air curtain cap comprises an outer ring(100) combined with the housing and provided with a jetting passage forming hole(11) perforated through front and rear sides(16,14) and an inner ring(101) combined with the outer ring. The inner ring has a center hole(23) perforated through front and rear sides(25,27) to pass the rod end and a jetting passage forming bar(21) inserted into the jetting passage forming hole. The main air jetting passage is formed by a gap(30a) formed between an outer peripheral surface(21a) of the jetting passage forming bar of the inner ring and an inner peripheral surface(11a) of the jetting passage forming hole of the outer ring.